ihasmail 2.0: rebuild as Stalwart-first JMAP webmail

Replace the FastAPI/HTMX prototype with a Node/Hono session proxy and a
React 19/Vite SPA. Mail (conversation view, search operators, labels,
sanitised HTML, privacy image proxy, invites, undo send, templates),
calendar (month/week/day/agenda, invites, free/busy, categories,
context menus), contacts (JSContact, groups, vCard), files, Sieve filter
builder (incl. filter-from-message with retroactive apply), vacation,
identities with default + Reply-To, PWA/mobile layout, push via SSE,
in-memory mock Stalwart for dev, Docker + CI.

web/package.json

@@ -0,0 +1,31 @@
+{
+  "name": "@ihasmail/web",
+  "version": "2.0.0",
+  "private": true,
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "tsc -p tsconfig.json --noEmit && vite build",
+    "preview": "vite preview",
+    "typecheck": "tsc -p tsconfig.json --noEmit",
+    "test": "vitest run"
+  },
+  "dependencies": {
+    "@tanstack/react-virtual": "^3.13.2",
+    "dompurify": "^3.2.4",
+    "lucide-react": "^0.477.0",
+    "react": "^19.0.0",
+    "react-dom": "^19.0.0",
+    "wouter": "^3.6.0",
+    "zustand": "^5.0.3"
+  },
+  "devDependencies": {
+    "@types/react": "^19.0.10",
+    "@types/react-dom": "^19.0.4",
+    "@vitejs/plugin-react": "^4.3.4",
+    "jsdom": "^26.0.0",
+    "typescript": "^5.7.3",
+    "vite": "^6.2.0",
+    "vitest": "^3.0.8"
+  }
+}